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51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
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# Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http:#www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import matplotlib
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# fix can't draw figure with docker
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matplotlib.use('Agg')
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import matplotlib.pyplot as plt
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# candidate colors
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LINE_STYLE_CANDIDATE = ['b-o', 'r-o', 'k-o', 'm-o', 'c-o', 'g-o', 'y-o',
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'b-s', 'r-s', 'k-s', 'm-s', 'c-s', 'g-s', 'y-s']
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def draw_line_chart(file_name, title, x_label, y_label, data_list):
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"""
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draw line chart and save to file.
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:param file_name: abs/relative file name to save chart figure
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:param title: chart title
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:param x_label: x-axis label
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:param y_label: y-axis label
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:param data_list: a list of line data.
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each line is a dict of ("x-axis": list, "y-axis": list, "label": string)
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"""
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plt.figure(figsize=(12, 6))
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plt.grid(True)
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for i, data in enumerate(data_list):
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plt.plot(data["x-axis"], data["y-axis"], LINE_STYLE_CANDIDATE[i], label=data["label"])
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plt.xlabel(x_label)
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plt.ylabel(y_label)
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plt.legend(fontsize=12)
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plt.title(title)
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plt.tight_layout(pad=3, w_pad=3, h_pad=3)
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plt.savefig(file_name)
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plt.close()
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